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In page Pleistocene Park:

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In the years 2004–2005, they erected a new fence, creating an enclosure of 16 km2 (6 sq mi).[1] The new enclosure finally allowed a more rapid development of the project.[1] After the fence was completed, reindeer were brought into the park from herds in the region.[citation needed] To increase moose density in the park, special constructions were added to the fence in several places that allow animals outside the fenced area to enter the park, while not allowing them to leave. Besides that, wild moose calves were caught in other regions and transported to the park.[citation needed]